Heald frame



Sept. 23, 1941- E. PFARRWALLER HEALD FRAME Filed Feb. 20, 1939 2Sheets-Sheet 1 INVENTOR.

I 'BAY ERW//VPFAZWALLER ORNEY Sept 23; 1941 E. PFARRWALLER 2,256,572

HEALD FRAME Filed Feb. 20,' 1939 2 Sheets-Sheet 2 IN VENTOR.

Patented Sept. 23, 1941 HEALD FRAME Erwin Pfarrwallei', Winterthur,Switzerland, assigner to Tefag Textil-Finanz A. vG., Winterthin',Switzerland Application February 20, 1939, Serial No. 257,363, InSwitzerland March 5;, 193B 15 Claims.

The present invention relates to heald frames for looms for weaving,particularly to frames which are operated from below to reciprocatinglymove up and down and in which the distance of the rails for filing thehealds is definitelymaintained by means of posts which upwardly lextendfrom speciallydesigned shafts and which are displaceable in thedirection of the longitudinal extension of the heald frames.

It is an object of the present invention to provide heald frames of thetype set forth which are particularly thin. If such thin frames aredriven from below and designed in conventional manner the upper part hasno guide and, due to its smally mass, has a ver-y small moment ofinertia in the direction of the Warp threads. Conventional frames aretherefore subject to vibrations Which may become so great that safe op?eration of the frames is impossible. Guide means proposed so farinterfere with the visibility of the warp and shed.

Frames have been proposed in which there is no upper shaft. The filingrails in this case are supported by means of posts which are rigidlyconnected with the lower shaft. Such rigidly connected posts and railsmake it necessary to exactly determine the numberv of warp threads inbetween two posts. Faulty warping causes friction between warp threadsand posts and damage to the threads. o

In the heald frames, according to the present invention, above theuppermost rail or cross bar forling the healds or heddles, an additionalguide rail may be provided which is equipped With guide elements whichare held to said guide Y rail by spring pressure and which aredisplaceable along said additional rail. The posts ex tend above theadditional rail by a length which is at least equal to the height of theshed. The posts of' one frame can thus rest against the guide elementsof the next adjacent frame. The guide elements preferably have the samewidth as the shaft. The shaft from which the posts extend is hollow andthe foot part of the posts extends into and is guided by the shaft forat least one fourth of the height of the shaft.

The shaft itself, according to the present invention, may be made ofsheet metal and be open on top and have a cross section in the form of aU. It may be closed and have an O shaped cross sectional configuration.In case of the shaft being open on top, inwardly bent rims may beprovided for partly closing the, top and preventing; the posts whichhave recesses @vorerstins with. said rims. from falling out of theshaft..

In. the case of the open shafts rivets may be prof. vided forinterconnecting theA side walls of the shaft. Y

At at least one end ofv the shaft no bent over rims are. provided sothat there remains an opening through which the posts can be inserted.In the case of a closed hollow shaft openings are provided on top and onthe bottom through which theA posts and the hooked frame support andactuating membersproject respectively. In'order to provide forinterconnecting the side wallsof the shaft, for example by means of buttwelding, special rims may be provided.

Further and other objects of the present invention will be hereinafterset forth in the accompanying specification and shown in the drawingswhich, by way oi illustration, show what I now consider to be apreferred embodiment of my invention.

In the drawings:

.Figure 1 is a f-ront view of a heald frame according to thepresentinvention.

Figure 2 is a cross sectional View of three adjacent heald frames.

Figure 3 is an enlarged cross sectional View of aheald shaftr accordingtofthe present invention taken along line IIL-III of Fig. 1.

Figure 4 is an enlarged cross sectional view of a heald shaft accordingtoY the present invention taken along lineIV-IV of Fig.- 1.

Figure 5 isV alongitudinal sectional View of a guide element accordingto the present inven.- tion. Y

Figure 6 is a side yview of the guide element shown in Fig. 5.

Figure 7 is a front view of a modied heald frame according to thepresent invention.

Figure 8 is an enlarged front View of a part of the heald frame shown inFig. '7.

Figure 9 is a cross sectional view of a heald shaft according to thepresent invention and taken along 4line IX-IX of Fig, 8.

Figure 1,0 is a crossl sectional view of a heald shaft according to thepresent invention and taken along line X--X of Fig. 8.

Figure 11 'is a longitudinal sectional View of a heald shaft and footpiece of a post according to the present invention and taken along lineXI-,ZXI in Fig. 8.

The heddle shaft I shown in Fig. 1 is operated from belowand made ofsheet metal. Asis obvious from Fig. 3 ithas tWo Walls 2 and 3 which areconnected at the bottom by means of Wall 4. Side walls 2 and 3 may beconnected by means of rivets 5. and be Provided Qn top with said rails.

inwardly bent rims 6, 6. The channel which is and 6 slidably holds theguide or foot members 1. The guide pieces I can be slidably displaced inthe direction of the longitudinal axis of the heddle shaft I. Each guidepiece 'I. carries a post 8 which posts support the ling rails 3, I andexactly maintain the distance between No inwardly bent rims are providedat at least one end of shaft I and for at least the length of one footmember 'I for permitting insertion into the shaft and removal of theposts Y 8 from the shaft. 1 g j I The heddles or healds II are filed onthe rails 9 and II] and are individually provided with mails II forcarrying the warp threads I2. The

per rail member. This third rail is provided with frictionally engagethe interior of the shaft sheath 25 and cause a restraining effect withrespect to movement in the direction of the warp threads.

Posts 32 are rigidly connected with the noses or projections 27 of themembers 28. These posts carry therails 33 and 34 for filing on thehealds or heddles II. An additional rail 35 is provided whichcorresponds to rail I3 in the embodiment shown in Figs. 1 to 6. Thisadditional rail relieves and protects the heddles and filing rails andassists in making the framework more rigid.

guide elements I4 which are slidable o'nlrail'l3` and are pressedthereto by means of springs I6. The width of guide elements I4 aswell'as ofthe posts 8'preferably conforms with the Width of the heddleshaft I. As is obvious fromv Fig. 2 the posts 8f which are carried bytheheddle shafts If which are adjacent to shaft I are adapt..` ed tolean laterally againstthe guide elements I4. It is advisablev to makethe posts 8 so long that the projection abovethe Vtop rail I3 isas greatas the height hof the shed." This assures that all heddle frames engageone another and form a heavy unit which lhas, great resistance againstvlateral movements and transverse vibrations. y y The bottom 4 of theheddle shaft I is provided with'a plurality, usually two,vrecesses oropenings l1 through which the hooked drivingv members! 8 extend whichmembers are driven from below and disposed between the side walls 2 4and3. ,For providing a rest for the hooks I8 bushings I9 are placed betweenthe walls i2. and.3 .and held thereto by small rims and 2|A which areproduced when the rivet 22 is applied.. The drive hooks I8 extend partlyaround thebushing. I9 and Ycarry the shaft I and transmitithereto an upand down'movement. v v Y In the embodiment of vthe .presentjinventionaccording to Figs. `1 tofl the guidefor support means 1 extendvinto theshaft I bythe distance a. Thisdistance-ispreferably greater than onequarter of the total height of the shaft so that means I and 'posts 8areV well-secured .against movement in the direction'of the warpthreads.

Figures?` to 11v illustrate an embodiment of the present invention inwhichsthe lguides or supports 28 are secured over the whole height ofthe heddle shaft I. j Y* The shaft jlfwhich is reciprocatingly movedfrom below by means of thelhooled members I8 is made of the sheet metal25 and' has a rectangular cross section. On top* rims 26 are providedwhich permit butt welding or other'rigid connections so thata box isformed. The rims26 as well as the upper wall 36 of said box are in,-terrupted at certain intervals Yso that openings are formed throughwhichjthe noses VZI of the guide'members 28extend. The mainbodies'ofmembers 28 fillthe interior of the shaft I which may be termed to be ofO shaped cross section in contradistinction to the U shaped` crosssection of the shaft according to Figs .-l'to 6. Members 28 are movableinthe direction'of the longitu'dinalextension of shaft I.". A breaking.eifecton'the movement l,of members 28 may be caused Yby the provision of springs 30,A 3l in suit- Inboth embodiments of the invention describedabove posts 3B are provided at the extreme ends of the heald frame whichend posts are rigidly connected with the heald shafts I or I. v 'While Ibelieve the above described embodiments of my invention to be preferredembodiments, I .wish it to be understood that I do lnot desire to belimited to theexact details of design and construction Vshown anddescribed, lfor obvious modifications will Yoccur to a person skilled inthe art. y

I claim: l Y y l. In a loom for weaving, a plurality of adjacent healdframes, each frame comprising afheald shaft, healds, a plurality'offiling rails for ling said healdsthereon, a plurality of posts uprightlyconnected with said'shaftfand-being displaceable in the direction of thelongitudinal axis of said shaft and laterally displaceably carrying anddefinitely maintaining the distance between said filing rails, and anadditional rail disposed above the uppermost of said filing rails andcarryinga plurality of guide members which are displa'ceable in thedirection of `the longitudinal axis of said frame and slidingly contactthe posts ofthe adjacent heald frames.

`2. In a loom for weaving, a plurality of adja` cent healdframes,` each'Aframe comprising a heald shaft, healds, aplurality of ling rails forfiling. said healds thereon, a plurality of'posts uprightly connectedwith said shaft and being displaceable inthe direction of thelongitudinal axis of said shaft and laterally displaceablycarrying anddefinitely maintaining the distance between said 'ling rails, andanadditional rail disposed abovethe uppermost of said filing rails andcarrying a plurality of guideV members which are resiliently Vpressed tosaid additional rail and are displa'ceable in the direction of thelongi-g tudinal axis of fsaid frame and slidingly Contact the posts ofthe adjacent heald frames. y

3.' Ina loomlfor Weaving, a pularilty of adjacent healdfrazneseach framecomprising a heald shaft, healds, Va plurality offling rails for filingsaidl healds thereon, and a plurality of posts uprightly connected'withsaid shaft and being displaceable in the direction of the longitudinalaxisy of said shaft and laterally displaceably carrying and definitelymaintaining the distance between said ling rails, said posts projectingabove the uppermost of said rails by a distance Which is at least equalto the height of the shed. y

4. Inaloom for'weaving, a plurality of ad-v jacent heald frames, keachframe comprising a heald shaft, healds, a plurality of filing rails forling said healds thereon, a pluralityaof posts uprightly connected4 withsaid shaft and rbeing displaceable inthe direction vof the longitudinalaxis' of said shaft and laterally displaceably carrying and definitelymaintaining the distance between said ling @rails andan additional "l"disposed above the uppermost of said iiling'rails;

and being adapted to slidingly engage the posts of the adjacent healdframes, said posts projecting above said additional rail by a distancewhich is at least equal to the height of the shed..

5. In a loom for weaving, a plurality of adjacent heald frames, eachframe comprising a heald shaft, healds, a plurality of filing rails forfiling said healds thereon, a plurality of posts uprightly connectedwith said shaft and being displaceable in the direction of thelongitudinal axis of said shaft and laterally displaceably carrying anddefinitely maintaining the distance between said filing rails, and anadditional rail disposed above the uppermost of said filing rails andcarrying a plurality of guide members which are as wide as said shaftand are displaceable in the direction of the longitudinal axis of saidframe and slidingly contact the posts of the adjacent heald frames.

6. A heald frame for looms for weaving comprising a heald shaft ofsubstantially U shaped cross sectional conguration with inwardly bentrims at the upper ends of the legs of the U, a plurality of posts havingsupport means at their lower ends and being inserted in said shaft andhaving recesses for accommodating said rims and being displaceable inthe direction of the longitudinal axis of said shaft.

7. A heald frame for looms for weaving comprising a heald shaft ofsubstantially U shaped cross sectional configuration, posts havingsupport means at their lower ends and being inserted in said shaft,inwardly bent rims at the upper parts of said shaft and extendingsubstantially over the whole llength of said shaft minus a length whichis at least equal to the length of said support means for providingspace for insertion of said posts into said shaft, and

prising a heald shaft of substantially U shaped and being in uprightposition and having, in itsv upper narrow side, a slot opening and acavity adjacent thereto, a plurality of post members inserted and beingslideably displaceable in said slot opening and cavity and freelyextending uprightly from and solely supported by said shaft.

10. A heald support as claimed in claim 9 in which the two outermost ofsaid posts are undisplaceably but otherwise in the same manner connectedwith said shaft as are the displaceable posts and in which' all saidposts are as wide as said shaft is thick whereby the front and rearedges of said posts are in the same planes as are the front and rearsides of said shaft.

1l. A heald support for looms for weaving consisting substantially ofonly one power driven heald shaft, said shaft being of oblongsubstantially rectangular U shaped cross sectional configuration andhaving two lateral wall portions in vertical upright position and, inits upper narrow side, a slot opening and a cavity adjacent thereto, aplurality of post members inserted insaid slot opening and clamped andslideably displaceable between and compressed by said wall portions andfreely extending upright-ly from and solely supported by said shafts.

12. A heald support for looms for weaving comprising one only healdshaft adapted to be power driven from below, a plurality of post membershaving foot portions slideably engaging said shaft, guide meansassociated with said shaft and with said foot portions and being soconstructed that said foot portions and posts associated therewith arefree for movement in the direction of the longitudinal extension only ofsaid shaft and that said foot portions are definitely permanently heldto said shaft in any other direction.

13. A heald support for looms for weaving comprising one only powerdriven hollow heald shaft, a plurality of post members, a foot meanspermanently rigidly connected with the lower end of each of said postmembers, said foot means .being positioned in the interior of saidhollow shaft and being freely slideably displaceable therein in thedirection of the longitudinal extension of said shaft, said post membersextending vertically upward from said foot means and said shaft.

14. A heald support for looms for Weaving comprising one only powerdriven hollow heald shaft having openings in the upper portion thereof,a plurality of post members, a foot means permanently rigidly connectedwith the lower end of each of said post members, said foot means beingcompletely positioned in the y interior of said hollow shaft and beingfreely slideably displaceable therein in the direction of thelongitudinal extension of said shaft, said post members extendingvertically upward from said foot means and individually through saidopenings in said shaft.

15. A heald support as claimed in claim 13 in which said foot meanscomprise resilient means slidingly engaging the interior of said shaftfor maintaining resilient frictional engagement of said foot means andsaid shaft.

ERWIN PFARRWALLER.

